DE9318062U1 - Paver - Google Patents

Description

*i

Road pavers

The invention relates to a road finisher of the type specified in the preamble of claim 1.

Such a road finisher is known from the brochure "The road finisher program" from Joseph Vögele AG, DE, with the number 2366/5.0/4.92. Since the side parts of the container in the swiveled-out filling positions protrude beyond the basic or transport width of the chassis of the road finisher, they are swiveled upwards and inwards during a transport journey (moving the road finisher from one construction site to another) and when the road finisher is transported on a low-loader, by rail or by ship and - for safety reasons, for example - mechanically secured against swiveling back. The side parts can be moved back and forth using the swivel drives, usually lifting cylinders. This swivel movement of the side parts is required when the road finisher is in operation in order to bring the filled paving material completely onto the transport device (scraper belts or conveyor screws) located in the middle of the container. In the brochure, the SUPER 1600 and 1800 models each have a safety device that has link chains anchored to the chassis or to the stationary rear wall of the container. Two people are required to secure or release the side parts, with one person adjusting the side parts using the swivel drives while the other person climbs into the container and hooks or unhookes the link chains.

In practice, manually operated sliding bolts are also

for the side parts, which must be mechanically secured in the holding positions. Handling this safety device is laborious and requires two helpers.

The invention is based on the object of enabling the fastening and loosening of the side parts in a road paver of the type mentioned at the beginning in a structurally simple manner in a user-friendly manner.

The stated problem is solved with the features contained in claim 1.

With this design, at least to release the side parts fixed in the transport positions, only the changeover pre-selector needs to be operated. This does not necessarily switch the safety device into the release position. Only when the swivel drives are activated to swivel the side parts slightly further inwards from the transport positions is the safety device automatically switched into the release position, so that the side parts can simply be swung outwards and downwards. This can be done by an operator and conveniently from outside the container. The side parts can also be secured in their transport positions easily and conveniently using the changeover pre-selector.

In the embodiment according to claim 2, the energy storage device is pre-tensioned by means of the changeover pre-selector. Only when the release position of the safety device is needed at any time can this be done conveniently by pivoting the side

parts because the energy storage device then becomes automatically active.

The handling is simple and convenient in the embodiment according to claim 3. The actuator is easily accessible from outside the container. The operator does not need to climb into the container to operate the changeover pre-selector. The changeover pre-selector can preferably even be operated from any side of the container.

A particularly user-friendly embodiment is shown in claim 4. The auxiliary drive can, for example, be controlled in the driver's cab or at any position on the road finisher in order to operate the changeover pre-selector. This does not exclude the possibility of operating the actuator manually if necessary.

A structurally simple, reliable and space-saving design is shown in claim 5. The catch hooks fix the side parts in their transport positions. This results in a stable fixation of the side parts in the event of transport-related vibrations. The catch hooks automatically move into the holding position of the safety device under the influence of gravity, if necessary with spring support, which saves laborious manipulation as soon as the changeover pre-selector has been activated accordingly. Since the catch hooks can be temporarily deflected in the swivel direction when passing the abutments and then automatically return to the holding position, the holding position can be pre-selected at any time, while it is only implemented when required.

A reliable function is provided in the embodiment according to claim 6. The catch hooks are in principle always striving to assume the holding position of the safety device due to the influence of gravity. The side parts are only fixed in the transport positions if this is controlled by the corresponding actuation of the pivot drives. However, the catch hooks do not move into the holding position or are moved from the holding position to the release position if the changeover pre-selector device is actuated accordingly, which engages the swivel arm with its actuator. If the side parts are in their swiveled-out positions when the changeover pre-selector device is actuated, then the catch hooks move into their positions corresponding to the release position of the safety device, in which they never interact with the abutments of the side parts. If, however, the side parts are fixed in their transport positions, then after the adjustment pre-selector is activated the safety device is prepared for the time when the release position of the safety device is needed by slightly swiveling the side parts inwards. The individual components are robust, simple and inexpensive parts whose reliable cooperation is guaranteed even under the rough working conditions on a road paver.

The special embodiment according to claim 7 is suitable for a road finisher in which the swivel drives of the two side parts work synchronously. This is because the two catch hooks can only move into the release position of the safety device if they

are released from the holding load of the abutments at approximately the same time. However, it is also conceivable to use this design if the swivel drives are not controlled simultaneously but individually. However, precise control is then required so that the side parts can be unlocked without any problems.

Another embodiment is shown in claim 8. In this design, each catch hook is pivoted independently of the other into the release position of the safety device as soon as the abutment resting against it is lifted. This design is suitable for road finishers in which the side parts can be pivoted independently of one another, or in which, due to special requirements, one side part must remain locked when the other is moved.

The embodiment according to claim 9 is structurally simple. The rod can be moved with little hand force, e.g. only a few kiloponds, to operate the changeover pre-selector.

In the embodiment according to claim 10, even under transport-related vibrations, an automatic release of the catch hooks from the abutments can be avoided because the catch hooks lock in a form-fitting manner and can only be released when the side parts are moved in a controlled manner.

In the embodiment according to claim 11, the deflection of the catch hooks by the abutments is achieved in a simple manner if the catch hooks are in their positions corresponding to the holding position of the safety device when the side parts are pivoted inwards.

-β A particularly useful embodiment is evident from claim 12. With the increasing automation of road pavers, the detector(s) indicates, e.g. to the operator, at the driver's cab and/or an automatic control system, that the catch hook(s), the actuator or the swivel arm has/have reached the correct position. In this way, damage to the safety device, e.g. by lowering the side parts while still locked, can be avoided.

Particularly useful in this context is the embodiment according to claim 13, in which a damaging actuation of the swivel drives is prevented on the control side until the catch hooks or other components of the safety device or the changeover pre-selector device have assumed the positions that ensure the safe actuation of the side parts.

A long service life and long maintenance intervals are provided in the embodiment according to claim 14, since the safety device and the changeover pre-selector with their moving components are shielded against contamination, e.g. by the installed material in the container.

Embodiments of the invention are explained with reference to the drawing. They show:

Fig.

a schematic perspective view of a road paver,

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Fig. 2 a front view of a road paver ,

Fig. 3 a detail of Fig.2, and

Fig. 4 shows another embodiment of a partial detailed view.

A road paver F (pavement paver, sidewalk paver, cycle path paver or similar) has a chassis 2 that can be moved on a chassis 1, on which there is a driver's cab 4, a primary drive source and, in the working direction, a container B for paving material. A paving screed 3 or another work device is towed at the rear end of the chassis 2. The container is limited at the sides by side parts 5, 6 that can be swiveled up and down. Swivel drives 7 are provided for swiveling, e.g. hydraulic cylinders or, in the case of a so-called electric paver, electric spindle drives or similar. A securing device S is provided on the stationary container rear wall designated 8 (or a stationary chassis part), with which the side parts 5, 6 can be secured in transport positions.

In the front view of Fig. 2, the side parts 5, 6 are pivoted with the pivot drives 7 between filling positions (shown in solid lines) pivoted outwards, in which they protrude outwards beyond the outline of the chassis 2, and transport positions (shown in dashed lines) in which they may even lie within the contour of the chassis 2. The side parts 5, 6 can even be pivoted with the pivot drives 7 beyond the

Transport positions (shown in dashed lines) slightly swivel further inwards. The swivel drives are controlled either from the driver's cab 4, or from other locations on the road paver F.

The safety device S is assigned a changeover pre-selector device V. On the side parts 5, 6, abutments 10, e.g. pins, are provided, on which the safety device S can be brought into engagement in the transport positions of the side parts 5, 6.

In the safety device S, two catch hooks 11, 12 are mounted so that they can pivot to a limited extent about stationary axes 13. Each catch hook 11, 12 has a nose 14, with which an abutment 10 can be gripped from behind, and a drive extension 15. The drive extensions 15 are connected in Fig. 2 via a link connection L (link 16) for a synchronous and opposite movement of the catch hooks 11, 12. A swivel arm A is attached to the catch hook 12 as a lever 17, which projects upwards into the range of movement of an actuator G of the changeover pre-selector device V. A rod 18 extending across the rear wall 8 of the container B, which is guided in a displaceable and rotatable manner, is held in bearings 19 and has a locking part 20 which can be supported on stationary position projections 21. The rod 18 forms the actuator G of the changeover pre-selector device and carries a stop 24 on which a force accumulator P in the form of a spring 23 is supported via an abutment 12. The force accumulator P acts on the swivel arm A and, together with the actuator G and the stop 24, forms a coupling K which acts in one direction, namely a coupling K which acts in the direction from right to left in Fig. 2.

The rod 18 can be moved back and forth by hand and can be optionally secured to the positioning projections 21. If necessary, an auxiliary drive M is provided to adjust the rod 18. The auxiliary drive M acts directly on the actuator G or on the abutment 22 or on the stop 24.

In the position of the rod 18 shown in solid lines in Fig. 2, the holding position of the safety device S is preselected. This means that the energy accumulator P (see Fig. 3) does not act on the lever 17. The catch hooks 11 are pivoted downwards within their limited pivoting range (limit stops 29 and 30) into positions that define the holding position of the safety device S, either by the influence of gravity or by means of a spring (not shown). The lever 17 of the swivel arm A rests against the limit stop 29 if necessary. The locking part 20 is supported on the position projection 21. If the side parts 5, 6 are pivoted inwards into the dashed positions, the abutments 10 are locked in the catch hooks 11, 12.

In order to achieve a positive locking, undercut support surfaces 27 and/or recesses 28 are formed on the noses 14 of the catch hooks 11, 12, which are matched to the shape of the abutments 10. The support surfaces 27 form an angle of less than 90° with the underside of the catch hooks 11, 12, for example.

On the outside of the nose 14 of each catch hook 11, 12, a deflection ramp 32 is formed, which recedes downwards and inwards at an angle and is adapted to the pivoting path of the abutment.

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ger 10 is aligned so that when the side parts 5, 6 are pivoted inwards and when the catch hooks 11, 12 are moved into the extended position as shown in Fig. 2 and 3, the abutments 10 automatically temporarily deflect the catch hooks upwards until the catch hooks 11, 12, after passing through the abutments 10, fall down again or are pressed down under the lugs 14 and engage behind the abutments 10.

An electric or electronic detector 26 aligned with the lever 17 generates a signal that indicates whether the catch hook 12 is raised or lowered. If necessary, the detector 26 is linked to a control device (not shown) that ensures that when the side parts 5, 6 are fixed in the transport positions, the swivel drives 7 cannot be operated in the lowering direction until the catch hooks 11, 12 are moved to the release position (Fig. 3, shown in dashed lines) of the safety device S. The detector 26 could also directly sense the nose 14 or the catch hook 12, 11.

According to Fig. 3, the rod 18 passes through an elongated hole 26 in a stop 25 of the lever 17, whereby the energy storage P or the spring 23 can work together with this stop 25, namely when the changeover pre-selector V is actuated to change to the release position of the safety device V. For this purpose, according to Figs. 2 and 3, the locking part 20 is supported on the other position projection 21, whereby the energy storage P or the spring 23 is pre-tensioned and exerts pressure on the stop 25. In the transport positions of the side parts 5, 6, the catch hooks 11, 12 are initially held in place by the positive engagement between the na-

-Ilsen 14 and the abutments 10 (extended position in Fig. 3). The spring 23 remains pre-tensioned. The torque around the axis 13 is absorbed by the positive connection between the abutment 10 and the nose 14. As soon as the swivel drives 7 are controlled in the swivel direction of the side parts 5, 6 inwards beyond the transport positions, the abutments 10 are released from the noses 14. The force of the pre-tensioned spring 23 swivels the lever 17 and the catch hook 12 into the dashed position in Fig. 3. The other catch hook 11 is adjusted accordingly via the handlebar 16. As soon as the detector 26 has determined and reported the correct release position, the swivel drives 7 are reversed and the side parts 5, 6 are lowered. Then the changeover pre-selector device V can be adjusted again so that the catch hooks 11, 12 swing downwards and are ready to catch the abutments 10 later. It is advisable that both side parts 5, 6 are adjusted synchronously and in opposite directions so that both catch hooks 11, 12 are released from the abutments 10 at the same time. If the swivel drives 7 are operated one after the other, both catch hooks 11, 12 only swing upwards when the second side part is also swung inwards.

In the embodiment according to claim 4, the catch hooks 11, 12 can be swiveled up individually and each time when the associated side part 5, 6 is swiveled inwards, which can take place independently of the swivel movement of the other side part. This is advantageous when operating the road finisher with only one side part swung out, as is the case, for example, when working along a wall or a building, where the side part on the wall does not extend over the

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The outline of the chassis may protrude outwards.

In the embodiment according to Fig. 4, the two drive extensions 15 of the catch hooks 11, 12 are connected in an articulated manner to one another and to the swivel arm A, here a lever 17' that can be swiveled about a pin 39, via a link connection L, the link connection consisting of two approximately coaxial links 16a, 16b. The inner ends of the links 16a, 16b are connected in an articulated manner to the lever 17'. The outer ends of the links 16a, 16b, on the other hand, are each connected to stops 31 of the drive extensions 15 via a coupling K that only works in one direction, with these couplings each containing a force accumulator P, i.e. a spring 23. The couplings K both only work in the swivel direction of the catch hooks 11, 12 from the holding position shown in solid lines to the release position (indicated by dashed lines). In the opposite direction, the catch hooks 11, 12 can be pivoted under their own weight and/or by spring loading if the changeover pre-selector device V or its rod 18 and the swivel arm A are in the position shown in solid lines in Fig. 4. If the rod 18 is adjusted to the right in Fig. 4 and secured, the stop 24 of the rod 18 takes the stop 25 with it (dashed position of the swivel arm A). If the catch hooks 11, 12 are in the holding position and locked by the abutments 10, the energy storage devices P or the springs 23 are only pre-tensioned. As soon as one or the other side part 6, 5 is pivoted slightly inwards beyond the transport position, the respective abutment 10 is released from the catch hooks 11 or 12, so that it is pivoted under the spring force into the release position shown in dashed lines. The limits

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Limit stops 30, 29 limit the swivel range of the catch hooks 11, 12.

In the embodiment according to Fig. 4, each catch hook 11, 12 is assigned its own detector 26, which generates a signal, e.g. as soon as the catch hook has reached the release position. Only then can the associated swivel drive 7 be controlled to lower the respective side part 5, 6. In a fully automatic version, the auxiliary drive M (Fig. 2), which can also be used in the embodiment according to Fig. 4, can be controlled, e.g. from the driver's cab 4, in order to preselect the release position of the safety device V when the side parts 5, 6 are locked in the transport position. As soon as the selected side part 5 or 6 has been swiveled slightly inwards by means of each swivel drive 7, the respective catch hook 11 or 12 moves into the release position, in which the detector 26 emits a signal that the release position has been reached correctly. Then, or only then, can the driver control the swivel drive associated with this side part in the lowering direction in order to adjust the side part to the filling position. In the embodiment according to Fig. 4, the auxiliary drive M could also act directly on the lever 17'. The auxiliary drive M is either a hydraulic or pneumatic working cylinder, a switching magnet or an electric spindle drive. Manual operation by means of the rod can be provided, but is then not absolutely necessary. The movable components of the safety device S and the changeover pre-selector device V are conveniently hidden behind a cover 30.

Claims (14)

Palefl^nspruche 1. Road finisher with a chassis on which a container for paving material is arranged, with side parts which delimit the container on both sides and which are mounted so as to be pivotable upwards and inwards from external filling positions about pivot axes approximately parallel to the longitudinal axis of the container, with at least one pivot drive per side part, and with a securing device which can be switched between a holding position and a release position for securing the side parts in transport positions, characterized in that the securing device (S) has a changeover pre-selector device (V) which can be actuated from outside the container (B) and, when the changeover pre-selector device (V) is actuated and the side parts (5, 6) are secured in the transport positions, can be switched indirectly by the pivot drives (7) at least between the holding position and the release position. 2. Road finisher according to claim 1, characterized in that the safety device (S) has at least one energy accumulator (P) which can be pre-tensioned by means of the changeover pre-selector device (V) and can be activated by pivoting the side parts (5, 6) inwards beyond the transport positions in order to change the safety device (S) into the release position. 3. Road finisher according to claim 1, characterized in that the changeover pre-selector device (V) has an actuator (G), preferably a manually operable actuator (G), which is arranged on the chassis (2) and to the side of the container (B), preferably accessible from both sides of the container (B). —1 R— 4. Road finisher according to claim 3, characterized in that the changeover pre-selector device (V) has an auxiliary drive (M) such as a hydraulic or pneumatic working cylinder, an actuating magnet or an electric spindle motor, preferably for the actuator (G). 5. Road finisher according to claims 1 and 2, characterized in that the safety device (S) for each side part (5, 6) has a catch hook (11, 12) which is movably arranged on the chassis (2) or on a stationary container wall (8) and which, in the holding position, engages behind an abutment (10) fixed to the side part in the swinging-out direction of the side part (5, 6), that each catch hook (11, 12) can be moved into the holding position under the influence of gravity, optionally with spring support, when the changeover pre-selector device (V) is actuated, and that each catch hook (11, 12) in the holding position can be automatically temporarily deflected in the swinging-in direction when passing the abutment (10). 6. Road finisher according to claim 5, characterized in that the catch hook (11, 12) is mounted so as to be able to pivot up and down to a limited extent about an axis (13) (holding position and release position) and has a drive extension (15), that a link connection (L) for jointly acting on the catch hooks (11, 12) in the pivoting direction about the axes (13) engages both drive extensions (15), and that at least one pivot arm (A, 17, 17') is provided which is coupled to the actuator (G) and mounted on the chassis (2) or on the container rear wall (8), which is connected either to a catch hook (11, 12) or to the - 16 - Handlebar connection (L, 16, 16a, 16b) is connected in a movement-transmitting manner. 7. Road finisher according to claim 6, characterized in that the link connection (L, 16) pivotably engages both drive extensions (15), that the pivot arm (A, 17) is rigidly arranged on a catch hook (12), and that between the actuator (G) and the pivot arm (A, 17) there is provided a coupling (K) which is effective in one direction, preferably in the direction of change to the release position, in which the energy accumulator (P), preferably in the form of a spring (23), is arranged. 8. Road finisher according to claim 6, characterized in that the link connection (L) has two approximately coaxial links (16a, 16b) which are pivotally connected with one end to the pivot arm (A, 17') and with their other ends to the drive extensions (15) via a coupling (K) which is effective in one direction, preferably in the direction of change to the release position, and in that a force accumulator (P), preferably in the form of a spring (23), is provided in each coupling (K). 9. Road finisher according to claims 1, 3 and 4 and 6 to 8, characterized in that the actuator (G) is a rod (18) which passes through the swivel arm (A, 17, 17'), is guided on the chassis (2) or on the container rear wall (8) and is rotatable about the longitudinal axis and has at least one locking part (20) which can be supported on positioning projections (21). 10. Road finisher according to claim 5, characterized in that each catch hook (11, 12) has a nose (14) which engages from above over the abutment (10), · • ·« - 17 - which has an undercut support surface (27) on the inside and/or a recess (28) matched in shape to the abutment (10), e.g. a pin, for positively locking the catch hook (11, 12) on the abutment (10). 11. Road finisher according to claims 5 and 10, characterized in that an inclined deflection ramp (32) aligned with the pivoting path of the abutment (10) is provided on the outside of the nose (14). 12. Road finisher according to at least one of claims 1 to 11, characterized in that at least one, preferably electrical, indicator (26) is provided at least for the release position of at least one or the catch hooks (11, 12) and/or for the position of the actuator (G) or the swivel arm (A). 13. Road finisher according to claim 12, characterized in that a control device is linked to the indicator (26) for the release position of the catch hook(s) (11, 12), with which an actuation of the pivot drives (7) in the pivoting direction of the side parts (5, 6) can be suppressed. 14. Road finisher according to at least one of the preceding claims, characterized in that the safety device is arranged behind a cover (30).